The SARA experiment onboard Chandrayaan-1 was a joint Indo-Swedish collaborative research program between SPL-VSSC and Swedish Institute of Space Physics (IRF), Kiruna, Sweden with participation from Japan (JAXA), and Switzerland (University of Bern). The main objective of the SARA experiment was to study lunar-solar wind interaction by means of the Energetic Neutral Atoms (ENAs) and the charged particles produced as a result of solar wind interaction with the lunar surface. The three components of the SARA experiment were: two sensors - CENA (Chandrayaan-1 Energetic Neutral Analyzer), which detected low energy neutral atoms in the 10-3300 keV energy range, and SWIM (Solar WInd Monitor), which measured the plasma flux in the near-lunar environment in the 10-3000 eV energy range, and the DPU (Digital Processing Unit) which commanded and controlled the operations on both the sensors. Both sensors had a fan shaped Field of View (FoV). Onboard commissioning of SARA was successfully completed in January 2009, and the planned normal operations began in February 2009. SARA performed well till the end of the mission. The measurements made by SARA have yielded many novel and path breaking scientific results - some of which are listed below

Observation of large (up to 20%) and sustained backscattering of solar wind protons as ENAs due to the interaction of solar wind with lunar surface.

The scattering function for the backscatteredENAs derived from the observations found to be different from the conventional expectations.

Discovery of Mini-magnetosphere on Moon.

Observation of reflected solar wind protons from dayside lunar surface and their dependence on the solar wind velocity.